Considering the complete lack of any weathering like we see on the top of the saucer (and in the episodes), it sure looks like it got repainted to me.

Yes, the top of the saucer - after the filming of "The Cage" and "Where No Man Has Gone Before".

Bob

__________________
"The first duty of every Starfleet officer is to the truth" Jean-Luc Picard
"We can't solve problems by using the same kind of thinking we used when we created them." Albert Einstein